Remove typedefs from data_grid-legacy.js

Bug: 1006759
Change-Id: I07c3fb9cc3840ffebd07c9dcd5dd2e3ab6ea006a
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2057206
Reviewed-by: Paul Lewis <[email protected]>
diff --git a/front_end/resources/BackgroundServiceView.js b/front_end/resources/BackgroundServiceView.js
index 2d7a2f9..ad6d7fa 100644
--- a/front_end/resources/BackgroundServiceView.js
+++ b/front_end/resources/BackgroundServiceView.js
@@ -218,7 +218,7 @@
    * @return {!DataGrid.DataGrid.DataGridImpl}
    */
   _createDataGrid() {
-    const columns = /** @type {!Array<!DataGrid.ColumnDescriptor>} */ ([
+    const columns = /** @type {!Array<!DataGrid.DataGrid.ColumnDescriptor>} */ ([
       {id: 'id', title: ls`#`, weight: 1},
       {id: 'timestamp', title: ls`Timestamp`, weight: 8},
       {id: 'eventName', title: ls`Event`, weight: 10},